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I have then started both VMs and simply waited for them to boot.[[BR]]

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The first one was extremely slow to boot, the second rebooted.[[BR]]

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The first one was extremely slow to boot, much more than usual when I boot 2 Win7 VMs[[BR]]

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The second actually made it and rebooted at some point during the boot.[[BR]]

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Once both VMs were booted, they frooze from time to time for while, programs like IE, Notepad and Explorer got display artfacts (not displaying a part of the window was always happening) until they both crashed with a BSOD.[[BR]]

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Finally, the VM 02 gave up, explorer crashed with a memory read/write error and went berzek by constantly sending garbadge on the vNIC.[[BR]]

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You will find two zips (VM01.zip & VM02.zip) both with the vbox.log aswell as the minidumps from the BSOD.

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You will also find a screenshot of VM 02 with the memory error.

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Note that if I shutdown both VMs, restore the snapshot to recover from the VDI corruption, disable page fusion then reboot, everything is fine. No part of the behaviour described above appear.